Well *that* was friendly.. you didn't have to sound mean about it >.<; because that's how it sounded to me..
Anyway.. I'll present my reasons..
Example 1 - The ( rather well-drawn) drawing of the transmutation circle.. I know that seems like a silly reason, considering she drew it to help Edward with his wish..
But think about it, since Nina was exposed to alchemy at a young age ( and saw the wonders of it, thanks to Ed) ..it would be possible that she would of thought about taking it up when she got older.. although that's just speculation.. but it wouldn't surprise me if that really did happen, she seemed to be very enthralled by it.
Example 2 - Both Nina and Shou's reactions to seeing Al for the first time, Nina seems extremely curious about her ' Bigger brother' and if you look at Shou for that split second
he's looking at Al, he's also curious as well ( and even has a shine in his eyes too)
Here's two screenshots of that particular scene..

Nina's reaction.

Shou's reaction.
My personal favourite example.. the dinner scene in episode 7, here they are practically doing the same thing.

And then there's the hug scene between father and daughter that takes place at different times in the manga and anime.
In a way.. the two of them seem to have switched roles and the hug postures have sort of been switched around.
Click to view attachmenthttp://i7.photobucket.com/albums/y298/Yang...TheHugScene.jpg - as the scene shows, in the manga; it's Nina who goes to Shou and wraps her arms around him in a hug.

- While in the anime, Shou's the one that goes to Nina and wraps his arms around her in a hug.
Surely all of those say something about who Nina would of been like when she got older.. even though all we can do is speculate on the topic.. I want to hear what everyone else has to say on the matter.
<Switched the posting of 1 oversizw pic to an Attachment to stop stretching of the forum page. ^^ 7/05/07 ~Tombow>